Electrode Coating Roll Map for Defect Traceability
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Solution Overview
Problem
Existing methods for marking defects in electrode coating processes of lithium secondary batteries are inadequate, as they often mark non-coated areas instead of actual defects, making it difficult to trace defects back to their origin in the coating process, and lack information on quality and defect history across processes.
Innovation Solution
A roll map system that visually displays quality-related and defect-related data on a simulated electrode shape, allowing for real-time tracking and analysis of defects and quality information during the electrode coating process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If physical marking is done directly on the electrode, then defect information can be displayed, but the exact location of defects cannot be accurately identified and quality history cannot be traced
Solution Approach 1:
The patent creates a virtual copy of the electrode in the form of a roll map that replicates the electrode's physical characteristics and defect locations. This virtual model allows precise tracking and analysis of defects without physically marking the actual electrode, thereby preserving exact location information and enabling quality history tracing.
Solution Approach 2:
The roll map serves as an intermediary between the physical electrode and the defect information system. Instead of directly marking the electrode, the system projects defect data onto the virtual roll map, which then can be analyzed and traced back to specific locations and processes without compromising the electrode itself.
2Reliability
If conventional marking methods are used, then defects can be identified, but inter-process quality relationship analysis becomes difficult
Solution Approach 1:
The system implements feedback by continuously updating the roll map with quality and defect information from various measuring instruments throughout the manufacturing process. This creates a traceable history that links defects back to specific process parameters and conditions, enabling inter-process quality relationship analysis while maintaining reliable defect identification.
3Loss of information
If physical marking is applied to electrodes, then defect information is recorded, but the marking process adds complexity and does not enable real-time analysis
Solution Approach 1:
The patent replaces the mechanical marking system with a digital information system. Instead of physically marking electrodes with ink or tags, the system uses virtual roll maps that store and display defect information digitally, thereby reducing physical complexity while improving information retention and enabling real-time analysis capabilities.
Data Source
AI summary
A roll map of an electrode coating process includes a roll map bar and a representation part. The roll map bar is displayed on a screen in synchronization with movement of an electrode between an unwinder and a rewinder while being coated with an electrode slurry in a roll-to-roll state. The roll map bar is displayed in the form of a bar by simulating the electrode in the roll-to-roll state. The representation part is configured to visually show either one of or both quality-related and defect-related acquired data associated with the electrode coating process. The acquired data is shown at a certain location on the roll map bar corresponding to a location in the electrode at which the data is measured. A roll map of an electrode coating process is generated by a process. A roll map of an electrode coating process is generated by a system.